<template>
  <el-container class="home-container">
    <!-- 头部区域-->
    <el-header>
      <div>
        <img src="../assets/heima.png" alt="">
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!-- 页面主体区域-->
    <el-container>
      <!-- 侧边栏-->
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <el-menu background-color="#333744" text-color="#fff" active-text-color="#409EFF"
        :unique-opened="true" :collapse="isCollapse" :collapse-transition="false" router
        :default-active="activePath">
          <!-- 一级菜单-->
          <el-submenu :index="item.id+''"  v-for="item in menuList" :key="item.id">
            <!-- 一级菜单的模版区域-->
            <template slot="title">
              <!-- 图标-->
              <i :class="iconsObj[item.id]"></i>
              <!-- 文本-->
              <span>{{item.authName}}</span>
            </template>
            <!-- 二级菜单-->
            <el-menu-item :index="'/'+subItem.path" v-for="subItem in item.children" :key="subItem.id"
            @click="saveNavState('/'+subItem.path)">
              <template slot="title">
                <!-- 图标-->
                <i class="el-icon-menu"></i>
                <!-- 文本-->
                <span>{{subItem.authName}}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 右侧主体区域-->
      <el-main>
        <!-- 右侧主体路由占位符 -->
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>

</template>

<script>
export default {
  data() {
    return {
      // 左侧菜单数据
      menuList: [],
      iconsObj: {
        125: 'iconfont icon-user',
        103: 'iconfont icon-tijikongjian',
        101: 'iconfont icon-shangpin',
        102: 'iconfont icon-danju',
        145: 'iconfont icon-baobiao'
      },
      // 是否折叠侧边栏
      isCollapse: false,
      // 被激活的左侧链接地址
      activePath: ''
    }
  },
  created() {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout() {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    // 获取所有的菜单
    async getMenuList() {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menuList = res.data
      console.log(res)
    },
    // 点击按钮控制菜单的隐藏和展开
    toggleCollapse() {
      this.isCollapse = !this.isCollapse
    },
    // 保存左侧链接的激活状态
    saveNavState(activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }

}
</script>

<style lang="less" scoped="">
  .home-container {
    height: 100%;
  }

  .el-header {
    background-color: #373d41;
    display: flex;
    justify-content: space-between;
    padding: 0px;
    align-items: center;
    color: #fff;
    font-size: 20px;

    >div {
      display: flex;
      align-items: center;

      span {
        padding-left: 15px;
        ;
      }
    }
  }

  .el-aside {
    background-color: #333744;
    .el-menu{
      border-right: none;
    }
  }

  .el-main {
    background-color: #eaedf1;
  }
  .iconfont{
    margin-right: 10px;
  }
  .toggle-button{
    background-color: #4a5064;
    font-size: 10px;
    line-height: 24px;
    color: #fff;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;

  }

</style>
